LG 50PB2DR help running extra fans

[Tommy2shoes]

Hi Fellas was hoping to some advice on running extra fans to cool heatsink. which pins would be best .I found and tried 12v and ground but seems to either stay on continuously or nothing. Have read a few posts of some of the Lads having done this but cant something like a how to.Any advice would be a God send. Cheers

[chrismurphy]

Re: LG 50PB2DR help running extra fans

I know you probably want to reduce the heat on then heatsinks ,but hot to touch is not hot for semiconductors
I would not bother , mounting the fans will be a big issue and the noise

[Tommy2shoes]

Re: LG 50PB2DR help running extra fans

Hi Chris thats the funny thing it hardly gets warm and yet after 10/15 minutes the sound goes it was only when I put a fan over the ysus that it ran all day. Fans are only 5x5 cm pulling those chips and heat sinks can be quite the task and worry about being up for the whole board, read a good article on here about heating the whole board up to 100 dgs in oven then using wick. Anybody else can point the way by all means feel free

[chrismurphy]

Re: LG 50PB2DR help running extra fans

Please do not and I mean DO NOT put boards in the oven ,YouTube posters should be shot for this. IT DOES NOT WORK and will damage components
Look for the issue by getting some freeze spray and locate the issue on the main board. The y-sus is not your issue for sound , the sound comes from the main board.
Get your freeze spray and target areas of the board until you narrow down the area ,then target individual components until you find the culprit , then replace the faulty component

[Tommy2shoes]

Re: LG 50PB2DR help running extra fans

Hey Chris check out Equipment Usage,Soldering,Techniques and Reviews.
Third page. Title; Desoldering Trouble , Pad Repair Questions. I think it makes sense and a technique worth considering especially if damage to pads and tracks through prolonged periods of heat at a singe point is the main issue. The board and components reach a peak of 200+ degrees while travelling through the reflow oven ( worked as a SMT, programming component placement and producing populated boards) and By starting with an overall constant temperature of say 100 dgs you would reduce the rate of which the temperature in the tip takes to heat and reach liquidity on the solder joint and the time taken for the tip to return to its temperature setting and maintain a soluble joint . Definitely a method worth considering when others have failed. Thanks heaps for your input of possible main board being trouble area. I am still learning the basic steps to follow and was concentrated on z-sustain/y-sustain boards following Toms steps in plasma trouble shooting reference guide of sound/ no sound. Still find it hard to go past the issue of sound there to begin with then goes missing and with just a cheap oscillating fan pointed at z-sustain all works fine and the sensing minimal heat come off that chips heatsink that its not the heatsink compound that needs to be reapplied. Once again sincere thanks for your input and will apply the process you suggested .

[chrismurphy]

Re: LG 50PB2DR help running extra fans

Ok but some components are not passed through ovens they are added after and wave soldered , but i dont want to argue
Replace the main board or and the faulty component
Putting it in the oven will destroy the board connectors and capacitors , but go ahead ,seems you have made up your mind and dont want to listen to informed advice